<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>偶滴乖乖</title>
</head>

<body>
    <h1>hello</h1>
    <button style="font-size: 20px; background-color: pink;font-weight: 600;" onclick="alert('hello')">hello</button>

</body>

</html>